63 lines
1.2 KiB
C++
63 lines
1.2 KiB
C++
#include "./opensslrandomdevice.h"
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#include "../io/cryptoexception.h"
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#include <c++utilities/conversion/binaryconversion.h>
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#include <openssl/err.h>
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#include <openssl/rand.h>
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#include <string>
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using namespace std;
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namespace Util {
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/*!
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* \namespace QtGui
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* \brief Contains all miscellaneous utility functions.
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*/
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/*!
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* \class OpenSslRandomDevice
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* \brief Provides a random device using the OpenSSL function RAND_bytes().
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*/
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/*!
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* \brief Constructs a new random device.
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*/
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OpenSslRandomDevice::OpenSslRandomDevice()
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{
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}
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/*!
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* \brief Generates a new random number.
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*/
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uint32 OpenSslRandomDevice::operator()() const
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{
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unsigned char buf[4];
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if (RAND_bytes(buf, sizeof(buf))) {
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return ConversionUtilities::LE::toUInt32(reinterpret_cast<char *>(buf));
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} else {
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string msg;
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unsigned long errorCode = ERR_get_error();
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while (errorCode != 0) {
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if (!msg.empty()) {
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msg += '\n';
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}
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msg += ERR_error_string(errorCode, 0);
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errorCode = ERR_get_error();
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}
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throw Io::CryptoException(msg);
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}
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}
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/*!
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* \brief Returns the status.
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*/
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bool OpenSslRandomDevice::status() const
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{
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return RAND_status();
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}
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}
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